252 Field Museum of Natural History — • Zoology, Vol. VII. 



Fig. 24. Chub Sucker. 



Erimyzon sucetta (Lac). (After Forbes and Richardson.) 



interorbital space slightly convex, 2.2 to 2.6 in head; dorsal fin a 

 little higher than long, its free margin convex; lateral line absent. 



Color uniform brownish olive, with more or less coppery lustre; 

 sides with dark lateral band, most conspicuous in the young; fins 

 dusky. 



Length about 10 inches. 



This fish ranges from the Great Lake Region to Virginia and 

 Texas. It prefers sluggish or still water where there is much vegeta- 

 tion. It spawns in April. Of little value as a food fish. 



Fox River, IlHnois; Dead River, Beach, Illinois; Des Plaines 

 River, Berwyn, Illinois; Hickory Creek, Alpine, Illinois; Lagoon, 

 Buffington, Indiana; Lagoon, Pine, Indiana; Calumet River, Clark, 

 Indiana; Lagoon, Edgemoor, Indiana; Lagoon, Gary, Indiana. 



Genus Miiiytrenia. Jordan. 



Striped Sucker. 



Body elongate, somewhat compressed; head small; mouth in- 

 ferior, the upper lip protractile, the lower plicate; fontanelle large; 

 pharyngeal bones weak, the teeth well developed; lateral line absent 

 in young, imperfectly developed in adults; air bladder in 2 parts. 



Minytrema melanops (Rafinesque). Striped Sucker. 



Head 3.9 to 4.6; depth 3.9 to 4.5; D. 11 or 12; A. 7 or 8; scales 42 

 to 46. 



Body elongated, moderately compressed; snout blunt; mouth 

 ■mall, inferior; lower lip plicate, its halves meeting at a short angle; 



